Crossword Genius

Company brought in the French package, backing green marketing (3-5)

Ross

I believe the answer is:

eco-label

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'green marketing' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'company brought in the french package backing' is the wordplay.
'company' becomes 'co' (abbreviation).
'brought in' means one lot of letters goes inside another.
'the french' becomes 'le'.
'package' becomes 'bale' (bale is a kind of package).
'backing' is a reversal indicator.
'le'+'bale'='lebale'
'lebale' in reverse letter order is 'elabel'.
'co' going into 'elabel' is 'ECO-LABEL'.

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I've seen this clue in The Independent.
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